"We were keen to explore how this new method of planning and buying outdoor media could increase exposure and awareness of our new service."

John Lewis is able to measure the effectiveness of sites in comparison with their cost as the ads run.

In turn, this information is being used to optimise the ads throughout the duration of the campaign by allowing the company to spend more on placements that have been found to deliver the best results.

Dan Larden, partnership director at Infectious Media, said: "OOH campaigns tend to be based on route survey data. With this collaboration, we have brought digital planning and measurement to OOH in order to increase its efficiency."

The campaign is appearing on roadside 48-sheet and 96-sheet digital sites and effectiveness is being measured based on the increase in website visits and online sales.

Stephanie Gutnik, vice president of business development at BroadSign, said: "This campaign breaks ground in the UK, not simply due to its programmatic nature but based on its use of multiple channels and data sources to optimise delivery and audience engagement."